258 HISTORY OF BRITISH MOSSES. 



and record it here^ under Muller^s name, var. tenellum. 

 It is smaller in all its parts, and often has a distinct nerve 

 reaching half-way up the leaf. 



54. Hypnum Halleri, Linn. [TlaUerian Feather Moss.) 

 Stems creeping, with short erect branches ; leaves broadly 

 ovate, acuminate, serrated very obscurely and shortly, two- 

 nerved, their extremities remarkably recurved; capsule ob- 

 longo-ovate, cernuous ; lid conical. — Eng. Fl. jj.^l; Mull. 

 Syn.pt. 9,. p. 440. 



Moist rocks on Ben Lawers, Scotland, very rare, where 

 we believe it was discovered by a trio well known to mus- 

 cologists, — Hooker, Arnott, and Greville ; reported to have 

 been found in Herefordshire by Mr. Dickson. Tr. May. 

 The regular and much recurved foliage of this species renders 

 it a very elegant moss. Though one of the rarest of British 

 Hijpmums, it is found abundantly in the alpine districts of 

 the continent, especially in Switzerland, where Haller first 

 gathered it. Drummond also discovered it on the Rocky 

 Mountains of J\"orth America. 



55. Hypnum dimorphum, Brid. {Dimorphous Feather 

 Moss.) Stems vaguely pinnated ; leaves cordato-ovate, con- 

 cave, serrulated, erecto-patent, obscurely two-nerved at the 

 base, those of the stems acuminated and reflexed at the 



